Furnace-lining.



D. B. HOWARD.

FURNACE LINING.

A.PPLICATION FILED NOV-11.1915.

Patented July 17, 1917.

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DONALD B. HOWARD, OF DES MOINES, IOWA.

FURNACE-LINING.

Specification of Letters Patent.

Patented July 17, 1917..

Application filed November 11, 1915. Serial No. 60,965.

flat or slightly curved wrought iron sheets which will have the advantages of being readily and easily detachable without manipulation of any bolts, screws, or the like; which will have their lower ends free to move both laterally and vertically to a limited extent, to provide for expansion and contraction, and also to prevent ashes, clinkers, etc., from becoming packed around the lower ends thereof; and further to provide for the free circulation of air from a point below the grate upwardly back of the lining plates and inwardly toward the fire box between the lining plates, for the double purpose of preventing the lining plates and the furnace wall from being burnt out and also for supplying fresh air to the fire box at the top of the ashes and coal therein, to facilitate combustion and the burning of smoke, and further in this connection. to provide passageways for air, which cannot become clogged up by the accumulation or packing of ashes.

A further object is to provide such a lining made of sections so mounted at theirupper ends as to permit the shaking of each section, and its slight movement vertically or horizontally.

My invention consists in the construction, combination, and arrangement of the various parts of the device whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 shows a front elevation partly in section of a furnace embodying my invention.

Fig. 2 shows a horizontal sectional view taken on the line 2-2 of Fig. 1.

Fig. 3 shows a perspective view of one of the supporting hooks.

Fig. lshows a perspective view of one of' illustrated in the accompanying drawings, I

have used the reference numeral 10 to inclicate generally the wall of a furnace. My furnace has substantially the shape of a horseshoe in horizontal cross section, the open end of the horseshoe being at the front of the furnace, as shown in Fig. 2. A suitable grate rest 11 is provided, which has a vertical flange 11 spaced from the wall 10 of the furnace. Mounted in the furnace wall 10, and spaced considerably above the grate rest 11, are a plurality of hooks, illustrated in Fig. 3, each having a screw threaded portion 12 extended through the furnace wall, a collar 13 adapted to engage the inner surface of the furnace wall, and an upturned hook member 1 1 slightly spaced from the collar 13. On the outer ends of the members 12 are nuts 15.

I provide a plurality of detachable liner members, each comprising a plate 16, having at its upper end a hole 17, considerably larger in diameter than the hook 14, and adapted to receive said hook, as shown in Fig. 1. The liner members 16 are hung from the books 14 in succession around the interior of the furnace, as shown in Fig. 1. As shown in Fig. 2, the liner members are slightly spaced from the furnace wall 10, and at their upper ends are held in such position by means of the collars 13. The parts are so constructed and arranged that when the liner members are dropped to their lower positions, their lower ends rest between the flange 11 and the wall 10 of the furnace. Itwill be understood that the grate rest 11, rests upon suitable supports, such, for in stance, as those shown at 18. The holes 17 are of such size as to permit the liner members 16 to be raised to swing inwardly and upwardly from the hooks. The members 16 are also suitably spaced from each other.

It will be seen that the hook member 14 can be moved to horizontal position, if desired, to make the removal of the liner members easier.

The advantages of such construction as has been hereinbefore described, in the pracply of superheated airto the upper part of the burning fuel, and to the fire above the grate, also makes it possible to consume a large part of the combustible material in the smoke, so that the construction shown and described produces a smoke consuming furnaceJ ,Any ashes dropping down between the liner members, and the grate can readily pass on into the ash-pit below the grate. The liner members may be readily removed by lifting them upwardly and swinging their lower ends inwardly for replacing them or repairing them.

Being spaced from the wall 10, the liner members permit the air to pass upwardly between them and the furnace wall, thereby preventing overheating of the wall and any consequent dangers, and also preventing warping'or burning of the main wall 10-of the furnace. r

On account of the fact that the liner members are permitted to swing freely between traction.

The making of the hole 17 of comparatively largersize, also tends to permit move- ,ment of the liner members in accordance with expansion or contraction, without interfering with the hook members, and without'putting any strain on the parts which are fastened to the wall 10.

In Fig. 5, has been shown a slightly modified form of the liner. members 20, which are segmental in shape, being curved from side to side, so that their rear surfaces are concave, and front or inner surfaces are con Copies of this patent may be obtained for the hot blast effect, by forming a chamber back of each liner member, which is open at its top and bottom, for permitting a direct upward draft. In this connection attention is called to the fact that the hot blast effect is obtained by the use of a comparatively small draft space.

I am aware that heretofore lining members have been provided for furnaces which could be detached, and which also were designed to allow the circulation of air be tween the lining and the furnace. These were usually of such complicated design to accomplish the purpose, for which they were intended, as to make it impractical to construct them of wrought iron sheets or plates, and hence were expensive, heavy, and cumbersome, and occupied an excess amount of space inside of the furnace, thereby reducing the fuel storage capacity and firepot radiation through the sheet 10.

It will be understood that some changes may be made in the arrangement and construction of my furnace without departing from its essential features, and it is my intention to cover by this application any such changes which may be included within the scope of my claims.

I claim as my invention:

1. In a furnace, a furnace wall, a grate rest mounted in the lower interior of said furnace, having a vertical flange spaced from said wall, a plurality of supporting members on said wall, a plurality of liner plates loosely supported 011 said respective supporting members, said plates having their lower ends received between said flange and said wall, said liner members being spaced from each other, the parts being so arranged that the liner members may be moved hori-.

zontally in a variety of directions and may also be moved vertically when installed in the furnace.

2. In a device of the class described, a furnace wall, a grate rest mounted 011 the i11- terior thereof having a vertical flange spaced from said wall, a plurality of hook members having portions mounted in said wall, and having hook portions on their inner ends, a plurality of liner member plates having openings receiving said hooks, means for spacing said plates from said wall at their upper ends, the lower ends of said plates being received in the space between said flange and the furnace wall, said liner members being spaced from each other.

Des Moin'es, Iowa, December 17, 1914.

DONALD B. HOWARD.

Witnesses:

A. SHERMAN, J. MAHER.

five cents each, by addressing the Commissioner of Patents, Washington, 13.0. 

